Replace "Phase N" call-outs in comments, doc strings, test messages, and one user-facing skip reason with descriptions of the actual subject (e.g. "the JWKS stage", "the scope_variations and dpop_edges sub-stages"). The phase numbers only made sense inside the original implementation plan and had become noise now that the plan is complete. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>